Dated Ratings

Recalculate coach ratings over a custom date range using BBANZ’s Elo method. Everyone starts at 150 on your start date. Results include a progression chart, a summary table, and Excel/CSV download.

Data & calculation

• Only 11s games from the last 3 years of stored NAF data are available.
• Games outside your start/end dates are ignored.
• Same Elo scale as the main ratings (K = 8, scale 175), but without the new-player double-K boost.

Coach filter

• Choose Country or Coach Names — not both.
• Country shows coaches from that country. Leave blank for all countries. All games still run for accurate Elo; only results and race filters target your selection.
• Coach Names lists specific coaches. Leave blank to include everyone.

Race filter

• Race filters only affect selected coaches (those listed by name). If no names are entered, the race filter applies to everyone.
• For a filtered coach, only games where they played an allowed race count toward their rating. Opponent race is unrestricted.
• Other coaches (not in your selection) still get full Elo on all races — they are not race-filtered.
• Categories (Agile / Bash / Hybrid / Stunty): untick a category to exclude those races.
• Choose races: leave all race boxes unticked to include every race in the active categories. Tick specific races to narrow further.
• Reset filters restores all categories ticked and clears race ticks, country, and search.

Example

Names = Alice; races = Wood Elf only → Alice’s non–Wood Elf games are skipped for her rating; everyone else is unaffected by the race filter.